1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jolli1 [7]
3 years ago
13

describe the general trend in electronegativity as metals in group 2 on the periodic table are concidered in order of increasing

atomic number
Chemistry
1 answer:
hjlf3 years ago
6 0

Answer:

Electronegativity decrease in group from top to bottom

Explanation:

You might be interested in
A hypothetical element has an atomic weight of 48.68 amu. It consists of three isotopes having masses of 47.00 amu, 48.00 amu, a
Morgarella [4.7K]

Answer : The percent abundance of the heaviest isotope is, 78 %

Explanation :

Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i

As we are given that,

Average atomic mass = 48.68 amu

Mass of heaviest-weight isotope = 49.00 amu

Let the percentage abundance of heaviest-weight isotope = x %

Fractional abundance of heaviest-weight isotope = \frac{x}{100}

Mass of lightest-weight isotope = 47.00 amu

Percentage abundance of lightest-weight isotope = 10 %

Fractional abundance of lightest-weight isotope = \frac{10}{100}

Mass of middle-weight isotope = 48.00 amu

Percentage abundance of middle-weight isotope = [100 - (x + 10)] %  = (90 - x) %

Fractional abundance of middle-weight isotope = \frac{(90-x)}{100}

Now put all the given values in above formula, we get:

48.68=[(47.0\times \frac{10}{100})+(48.0\times \frac{(90-x)}{100})+(49.0\times \frac{x}{100})]

x=78\%

Therefore, the percent abundance of the heaviest isotope is, 78 %

5 0
3 years ago
Read 2 more answers
Write the equation, Aluminum metal reacts with oxygen gas to produce aluminum oxide solid.
Alenkasestr [34]
The equation is:4Al+3O2----2Al2O3
8 0
3 years ago
How does a sugar solution become rock candy?
Hatshy [7]

Answer:

Explanation:

A supersaturated solution is unstable—it contains more solute (in this case, sugar) than can stay in solution—so as the temperature decreases, the sugar comes out of the solution, forming crystals. The lower the temperature, the more molecules join the sugar crystals, and that is how rock candy is created.

4 0
3 years ago
In the cathode ray tube experiment, J. J. Thomson passed an electric current through different gases inside a cathode ray tube i
Ber [7]

It showed that atoms can be divided into smaller parts.

It showed that all atoms contain electrons.

Explanation:

The experiment carried out by J.J Thomson on the gas discharge tube by passing electric current through a tube filled with many different gases provided a good insight into the structure of an atom.

This experiment led to the development of the plum pudding model of the atom.

  • Cathode rays and it properties were discovered in this set up.
  • It furnished the scientific community with evidences that atoms can be divided into smaller parts.
  • Since atoms now contain some subatomic particles, they can be broken down in like manner into further bits.
  • The cathode rays which were later termed electrons became a fundamental particles known for every atom.

learn more:

Rutherford's model of the atom brainly.com/question/1859083

#learnwithBrainly

6 0
3 years ago
Read 2 more answers
2 KCIO3 - 2 KCl + 302;<br>Type of Reaction?<br><br>​
Ierofanga [76]

Answer:decomposition reaction

Explanation:it is a decomposition reaction

6 0
3 years ago
Other questions:
  • An example of checmial weathering is when exposed to air a rock containing iron turns red
    7·1 answer
  • Balance the following redox equation in acidic solution using the smallest integers possible and select the correct coefficient
    11·1 answer
  • In the following reaction: HCO3- (aq) + H2O (aq) → H2CO3 (aq) + OH- (aq)
    11·1 answer
  • To neutralized 1.65g LiOH, how much .150M HCl would be needed?
    12·1 answer
  • Next to each formula, write the number of atoms of each element found in one unit of the compound
    10·1 answer
  • Using 3 – 4 sentences explain (in your own words) why water expands when it freezes?
    7·2 answers
  • The international treaty which provides operational rules on reducing greenhouse gas emissions is called:______
    9·1 answer
  • If a sample of oxygen occupies a volume of 85.0 L at a pressure of 67.4 kPa and a temperature of 245K , what volume would the ga
    11·1 answer
  • 137g of Ba + ______ g oh I --&gt; 391g of BaI2
    5·1 answer
  • What is the function of nucleosomes ?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!